Question

in this cartoon version of the \enter er\ model (on the left here), which of the 3 stages would correspond to the way
ough er\ looks in many microscope images? select all that apply.
ribosome
mrna
signal sequence
rna - protein particle
receptor
er membrane
channel
protein
left
middle
right

Explanation:

The rough endoplasmic reticulum (ER) appears rough because of the presence of ribosomes on its surface. In the model, the ribosomes are attached to the ER membrane in the middle and right - hand stages, which is consistent with the appearance of rough ER in microscope images. In the left - hand stage, the ribosome is not yet attached to the ER membrane.

Answer:

Middle
Right